Rotary recording medium having track turns recorded with digital

Details Rotary recording medium having track turns recorded with digital Rotary recording medium having track turns recorded with digital

1984-05-11

1987-04-21

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 48, 369 59, H04N 576

Patent

active

046600990

ABSTRACT:
A rotary recording medium has information signals recorded on a spiral or concentric tracks formed thereon as variations in geometrical configuration. The tracks comprise a mixture of digital recorded tracks which are recorded with a first modulated signal and analog recorded tracks which are recorded with a second modulated signal. The first modulated signal is a digital signal which has been time-sequentially multiplexed in terms of blocks at a transmission frequency of 44.1 kHz or a frequency extremely close to 44.1 kHz and has then been subjected to a modulation, where each of the blocks are constituted by a synchronizing signal, error correcting codes, and an error detecting code, which are added to a plurality of channels of digital data which are digitally modulated information signals. The second modulated signal is an analog modulated analog information signal at least including a composite video signal. A number of blocks recorded in one track turn of the digital recorded tracks is approximately equal to a product of the transmission frequency and a duration of one revolution of the rotary recording medium.

REFERENCES:
patent: 4476499 (1984-10-01), Kanamaru et al.
patent: 4513327 (1985-04-01), Takahashi et al.

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